docs: def _load_sentence_list(self, path):
          """
          Load and filter the sentence list.
  
          Args:
              path (str): Path to the sentence list.
  
          Returns:
              dict: Dictionary of sentences (id : language, transcription)
          """
  
          result = {}
  
          for entry in textfile.read_separated_lines_generator(path, separator='\t', max_columns=3):
              if self.include_languages is None or entry[1] in self.include_languages:
                  result[entry[0]] = entry[1:]
  
          return result